Hi, i am Omar Drammeh, i am a gambian, living in the gambia and want to apply a visa for China

You can try to apply one at Chinese embassy in Senegal. Generally speaking, you need to prepare your valid passport, an application form with recent taken photo, hotel bookings & round trip tickets to China and bank account with at least 3 months deposit. For other specific requirements, you may need to contact the embassy for knowing more.